Transistor substitutes 2SA532 --- ZTX795A 2SA561 --- KSA733C (C-suffix= collector center) 2SA562 --- BC327 2SA606 --- 2SA640 --- ZTX795A or KSA992 2SA678----- KSA1015 2SA697 --- ZTX795A 2SA706 --- KSA1381ESTU, BD136 2SA725 --- KSA992FTA/-FBU, BC560 2SA726 --- KSA992FTA/-FBU, BC560 2SA733 --- KSA733C (C= collector center) 2SA745 --- MJ15004G, upgrade: MJ21193 2SA747 --- MJ21193G (for example AU-9900/11000 output) 2SA750 --- KSA992FBU 2SA818 --- KSA1381 (pin order!), KSA1142, (2SA0914?) 2SA839 --- MJE15035, 2SC1669 2SA847 --- KSA992 2SA850 --- KSA1013, KSA992 2sa872 - KSA992FTA 2SC875 ---ZTX694B 2SA896 --- KSA1381ESTU (pin order!) 2SA899 --- KSA1142, KSA1220AYS, KSA1381 2SA908 --- MJ21193G, MJ21195G (for example AU-20K output) 2SA914 --- KSA1142, KSA1381 2SA917 --- 2N5400 (pin order!) 2SA939 --- KSA1381, KSA1220AY 2SA945 - KSC945CGBU 2SA953 --- KSA931YTA 2SA958 --- ?? 2SA968 --- MJE15033 2sa970 ecb ksa 992 ecb 2SA981 --- MJ21194G 2SA991 === 2SA1016K 2SA1011 --- 2SA1837 or MJE15035 2SA1104 --- MJL1302AG 2SA1105 --- 2SA1695 2SA1106 --- 2SA1695 (avail. fr. Digikey), NJW1302G 2SA1222 --- KSA1220AY 2SB327 --- KSA1220A 2SB507 --- MJE15033G 2SB507(E,F) --- KSA1010Y 2SB526 --- MJE15033 2SB527 --- MJE15033, KSA1220 2SB528 --- 2SA1837 (TO220,insulated case) KSA940 2SB536 --- KSA1304Y, MJE15033G 2SB537 --- MJE15031G 2SB545(A) --- MJ21193G 2SB595 MJE15033 2SC281 --- KSC1815 2SC458 --- 2SC1815 is best or 2SC2240, 2SC1345 2SC711 --- KSC1845, KSC2310, KSC945 Pinout difference! all ECB 711 is BCE 2SC735 --- BC337 2SC871 --- 2SC2240, KSC1845, or even BC549C or BC550C (pin out differences!) 2SC875 --- ZTX694B 2SC900 --- KSC1815 2SC945 --- EBC -- KSC1815YTA EBC or KSC945C ECB 2SC959 2SC968 --- KSC2383 ECB, KSD1616 ECB 2SC983 --- KSC1845 ECB 2SC984 —> KSC2383 2SC1116 --- MJ21194G (for example AU-9900/11000 output) 2SC1124 --- KSC2073 or MJE15032 2SC1210 --- KSC3503 2SC1211 --- KSC2383 2SC1222 --- KSC1845EBU 2SC1312 --- KSC1815, KSC1845 2SC1313 --- KSC1815 preferably or KSC1845FTA (Must install them backwards of original 2SC1313 which is BCE the KSC1845FTA is ECB.) 2SC1364 --- KSC945C (best if used on protection board), KSC2690 (for more demanding use) 2SC1400 --- KSC1845 2SC1402 --- MJ21194 2SC1403A--- MJ15003G, upgrade MJ21194 2SC1451 --- KSC3503 2SC1585 --- MJ21194G, MJ21196G (for example AU-20K output) 2SC1628 --- KSC3503 (pin order!), (2SC1953?) 2SC1669 --- MJE15034 2SC1708 --- KSC1845 2SC1735 --- KSC2383, KSC1845 2SC1775 - KSC1845EBU 2SC1811 --- KSC3503ESTU 2SC1844 --- 2SC2362 2SC1904 --- KSC3503, KSC2690AY 2SC1951 --- ZTX694B 2SC1953 --- KSC2682, KSC3503 2SC1983 --- TIP112F or KSD1273Q 2SC2071 --- KSC3503, KSC2690AY 2SC2238 --- MJE15032 2SC2240 --- KSC1845 2SC2261 --- MJ21193G 2sc2291 ecbce ksc 1845 ecb match pairs 2SC2344 --- 2SC4793 or MJE15034 2SC2579 --- MJL3281AG 2SC2580 --- 2SC4468 2SC2581 --- 2SC4468 (avail. fr. Digikey), NJW3281G 2SD188(A) --- MJ21194G 2SD247 --- MJ15003G 2SD313(E,F) --- KSC2334Y 2SD356 --- MJE15032 2SD358 --- KSC2690 2SD357 --- KSC2690A, KSC2073 2SD381 --- KSC3296Y, MJE15032 2SD382 --- MJE15030G, MJE15032 2SD525 MJE15032 2sd438 d,e, ksc2690a 2sd438 -- ksc2383 2sb560 -- ksa 1013 2sc536 -- ksc 1815 2sc2274 -- ksc2690a 2sk109 --- 2n3819 use 2 and they will work. they are N-channel JFET type. the basing for the transistor (from front) is D,G,S. the IC pin out is 1=D, 2=G and 3=S and then pin 7=D, 6=G and 5=S for the other side. Or 2SK150 - M47F - 2SK389GR XA495 --- ZTX795A Diodes/rectifiers: 10D1 --- 1N5392, 1N5393 10D2 --- 1N5392, 1N5393 10D4 --- 1N5404 30D2 --- 1N5402G 1N60 --- BAT41 1S953 --- 1N4148 1s1555 --- 1n4148 1S1588 --- 1S2473, 1N4148 1S2473 ---- 1N4148, 1N4149 DS430 --- 1N4148 VD1212 --- 2pcs of 1N4148 connected in series 1S1850 --- MUR1620CTG (TO220) - or use 1N5393G (200V 1.5A) or 2A03 (200V/2A) to make your own Common Cathode -diode pack 1S1850R --- MUR1620CTRG (TO220) - or use 1N5393G (200V 1.5A) or 2A03 (200V/2A) to make your own Common Anode -diode pack SS3 SS3R SV02 pair of 1N4148 Zeners EQA01-20R --- 1N5932 EQB01-22 --- BZV85-C22 or 1N4748A RD9.1E --- BZX79B9V1 or maybe 1N5239 RD9A --- 1N5238B RD-13A --- TZX13A-TR RD-15E --- ??? Maybe 1N5245BTR, comments? RD-22E --- ??? Maybe 1N5251BTR, Comments? RD-33E